How to Do a Bent Arm Plank
Strengthen the abdominal and back muscles with a bent arm plank. The key to getting the most out of this challenging core strengthener is to concentrate and hold the position.
Get into plank position by supporting your body weight on your forearms and toes.
Keep your abdominals contracted and your back straight, eyes ahead of you.
Hold this position for as long as you can, building up to 1 minute.